in rome, where the premiere sent a message to president obama condemning what he called the cowardly bombings in america. in rio de janeiro, where they're getting ready for the him glikes 2016, cracking down on anyone who looks out of place today. police seemingly everywhere in new york city. extra security for the dodgers game in los angeles in washington in las vegas, atlanta, chicago, no matter where you look, cities and the whole country is on the lookout, here, and there, and we got you covered everywhere. with amy kellogg in a nervous london, and eric in times square, and sheryl outside fortress wall street, and rick leventhal in an anxious boston. we start with rick. >> a number of developments this afternoon, including a boston globe report that investigators found a circuit board believed to have triggered the bombs. they were made with pressure cookers, a style of explosive device found in afghanistan and pakistan. we learned that the saudi national who was tackled running from the scene, whose apartment was searched, has been cleared as a possible suspect, and they have re